What is a solar greenhouse? What is an energy efficient solar greenhouse?

Solar greenhouse is the abbreviation of energy-saving solar greenhouse, also known as greenhouse, which is composed of two side gables, maintenance walls, support skeletons and covering materials. It is a type of greenhouse unique to the northern region of China. It is a kind of greenhouse that is not heated indoors, and realizes heat storage and release through the absorption of solar energy by the back wall, and maintains a certain indoor temperature level to meet the needs of vegetable crop growth.

There are also some farmers who add heating measures in their greenhouses, such as stoves, boilers, heating pipes, or night insulation measures, such as roller shutters, quilts, etc.).

Advantages of the solar greenhouse sedan car:

1. The lighting of the front and rear slopes of vegetables cultivated in the solar greenhouse is uniform and consistent;

2. The temperature change of the solar greenhouse is reasonable;

3. It is suitable for dense planting and repentance;

4. The greenhouse span is large, the scale is large, and the effective space is large;

Bique Liang 5, good thermal insulation effect;

6. Save energy and make full use of solar energy;

7. The measures are simple and easy to build;

8. The possibility of harm is small.

The difference between the sun and Dapeng is mainly that the area of the solar greenhouse is relatively large, and it is easy to operate, this is mainly because the thermal insulation measures are relatively poor in winter, and the area of the greenhouse is a little smaller, but the thermal insulation measures are better.

The structure of solar greenhouses varies from place to place, and there are many ways to classify them. Solar greenhouses are suitable for the north.

According to the wall material, it is mainly divided into dry soil greenhouse, masonry structure greenhouse, composite structure greenhouse, etc.

According to the length of the rear roof, there are long back slope greenhouses and short back slope greenhouses; According to the form of the front roof, there are two-fold type, three-fold type, arch round type, micro arch type, etc.

The greenhouse is covered with plastic film. It is suitable for large-area coverage, because it is light in weight, has good light transmission and thermal insulation performance, strong plasticity, and is inexpensive.

And because of the use of lightweight skeleton materials, it is easy to build and shape, can be taken on the spot, the construction investment is less, and the economic benefits are higher. And can resist natural disasters, cold and heat preservation, drought resistance, waterlogging, early cultivation, postpone cultivation, prolong the growth period of crops, to achieve the purpose of early maturity, late maturity, increase and stable yield, and are welcomed by producers.

The performance characteristics of the solar greenhouse, the lighting characteristics of the solar greenhouse are related to the season, time, weather, greenhouse orientation, structure, building materials, management technology and other natural factors. And it changes with the change of the above factors. The seasonal and diurnal trends of light intensity in the solar greenhouse are basically the same as those in the outdoor area, but the visible light is significantly weakened after the visible light enters the solar greenhouse through the plastic film, which is mainly due to the loss caused by light reflection, plastic film absorption, skeleton shading, aging of plastic film materials, dust pollution and water droplet reflection.

The middle of the greenhouse is the area with the best sunlight throughout the day. Due to the shading effect of the gables, two active low-light zones are formed at the east and west ends before noon and afternoon, which contract or expand with the change in the height of the sun and disappear at noon. In the vertical direction, the light intensity decreases from top to bottom.

In the north-south direction, the light intensity gradually weakened from south to north, and the ** pillar on the north side weakened significantly. Due to the need for heat preservation in winter and spring, the solar greenhouse is covered with straw and insulation, uncovered after sunrise and covered before sunset, artificially extending the indoor dark time. Generally, from December to February of the following year, the indoor light time is only 6-8h

After March, as the temperature rises, the covering and heat preservation time can be appropriately shortened, and the indoor light time can reach 8-loh. The spectral composition of the light chamber is related not only to the height of the sun, but also to the properties of the covering material. The ultraviolet transmittance of plastic film is relatively high, which is conducive to the robust growth of plants and promotes the synthesis of anthocyanins and VE.

The ultraviolet transmittance of PE film is higher than that of PVC film.

The performance characteristics of solar greenhouse, the light characteristics of solar greenhouse are related to natural factors such as season, time, weather and greenhouse orientation, structure, building materials, management technology, etc., and change with the changes of the above factors.

1) High or celebratory intensity.

The seasonal and diurnal trends of light intensity in the solar greenhouse are basically the same as those in the outdoor area, but the light intensity of visible light is significantly weakened after entering the solar greenhouse through the plastic film, mainly due to the loss caused by the reflection of light, the absorption of the covering, the blocking of the skeleton, the aging of the covering material, the dust pollution and the reflection of water droplets.

The middle part of the solar greenhouse is the area with the best sunlight throughout the day, and the east and west ends form two active low-light areas before and after afternoon due to the shading effect of the gable, which shrink or expand with the change of solar altitude and disappear at noon. , vertically, the light intensity decreases from top to bottom. In the north-south direction, the light intensity gradually weakened from south to north, and the central pillar on the north side weakened significantly.

2} Illumination time.

In winter and spring, the solar greenhouse is covered with straw and thermal insulation quilts, etc., and is unveiled after sunrise, covered before sunset, artificially prolongs the indoor night time. Generally, from December to February of the following year, the indoor light time is only 6-8h

After the collapse in March, with the increase of temperature, the covering and heat preservation time can be appropriately shortened, and the indoor light time can reach 8-loh.

3) Light quality. The spectral composition of the chamber is related to the nature of the covering material, in addition to the height of the sun. The ultraviolet transmittance rate of plastic thin film is relatively high, which is conducive to the healthy growth of plants, and also promotes the synthesis of anthocyanins and VE, among which the ultraviolet transmittance of PE film is higher than that of PVC film.

Solar greenhouse is the abbreviation of energy-saving solar greenhouse, also known as greenhouse, is a very common type of greenhouse in northern China, is a kind of indoor greenhouse without heating, even in the coldest winter, it only relies on sunlight to maintain a certain temperature level indoors to meet the growth of crops and vegetables.

Greenhouse - refers to a plastic greenhouse, the top is arc-shaped, and the top is covered with film, also called bread shed, arch shed, cold shed. Its own thermal insulation capacity is poor, heating energy consumption is high, suitable for the southern region of China, in the north does not need to do overwintering production, generally only used for spring in advance, autumn delay.

1. Solar greenhouse, specifically a vertical and oblique solar greenhouse, solar greenhouse is only suitable for northern production, and the more prominent one is Shandong Shouguang. Solar greenhouse, structure a soil wall, with wood plus film, slope can be fully lit, night earth wall can emit the heat absorbed during the day, solar greenhouse cost is low.

2. The plastic greenhouse is basically a steel frame and a bamboo structure, and the general frame is a steel frame, which is expensive and suitable for use in rainy places in the south, with good lighting, and is also determined according to the different sunrise angles in the north and south.